/* 全局基础重置与艳红热烈主题规范 */
    :root {
      --primary-red: #d9232e;
      --primary-dark: #b31620;
      --primary-light: #fff0f1;
      --primary-accent: #ff4d4f;
      --gold-accent: #f59e0b;
      --gold-light: #fef3c7;
      --bg-main: #fdfaf9;
      --bg-card: #ffffff;
      --bg-alt: #fbf5f4;
      --text-main: #1f2429;
      --text-regular: #4b5563;
      --text-muted: #6b7280;
      --border-color: #fee2e2;
      --border-soft: #f3f4f6;
      --shadow-sm: 0 2px 6px rgba(217, 35, 46, 0.04);
      --shadow-md: 0 10px 25px rgba(217, 35, 46, 0.08);
      --shadow-lg: 0 18px 38px rgba(217, 35, 46, 0.12);
      --transition: all 0.28s ease-in-out;
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-main);
      color: var(--text-main);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

    /* 统一居中容器规范 */
    .container {
      width: 100%;
      max-width: 1200px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: var(--transition);
    }

    ul, ol {
      list-style: none;
    }

    img {
      max-width: 100%;
      height: auto;
      display: block;
    }

    /* 通用区块排版 */
    section {
      padding: 70px 0;
      position: relative;
    }

    .section-alt {
      background-color: var(--bg-alt);
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
    }

    .section-header {
      text-align: center;
      max-width: 800px;
      margin: 0 auto 46px;
    }

    .section-badge {
      display: inline-block;
      padding: 5px 14px;
      background-color: var(--primary-light);
      color: var(--primary-red);
      font-size: 0.85rem;
      font-weight: 700;
      border-radius: 20px;
      margin-bottom: 12px;
      border: 1px solid #fecdd3;
      letter-spacing: 0.5px;
    }

    .section-title {
      font-size: 2.1rem;
      font-weight: 800;
      color: #111827;
      margin-bottom: 14px;
      line-height: 1.3;
    }

    .section-subtitle {
      font-size: 1rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.96);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid #fce7e7;
      box-shadow: var(--shadow-sm);
    }

    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }

    .nav-brand {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .ai-page-logo {
      height: 42px;
      width: auto;
      object-fit: contain;
    }

    .brand-text {
      font-size: 1.25rem;
      font-weight: 800;
      color: var(--primary-red);
      letter-spacing: -0.5px;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
    }

    .nav-links a {
      padding: 8px 12px;
      font-size: 0.93rem;
      font-weight: 600;
      color: var(--text-main);
      border-radius: 6px;
    }

    .nav-links a:hover {
      color: var(--primary-red);
      background-color: var(--primary-light);
    }

    .nav-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 0.95rem;
      font-weight: 700;
      border-radius: 8px;
      border: 1px solid transparent;
      cursor: pointer;
      transition: var(--transition);
      text-align: center;
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--primary-accent), var(--primary-red));
      color: #ffffff;
      box-shadow: 0 4px 14px rgba(217, 35, 46, 0.3);
    }

    .btn-primary:hover {
      background: linear-gradient(135deg, var(--primary-red), var(--primary-dark));
      transform: translateY(-2px);
      box-shadow: 0 6px 18px rgba(217, 35, 46, 0.4);
      color: #ffffff;
    }

    .btn-outline {
      background: #ffffff;
      color: var(--primary-red);
      border-color: var(--primary-red);
    }

    .btn-outline:hover {
      background: var(--primary-light);
      transform: translateY(-2px);
    }

    .btn-gold {
      background: linear-gradient(135deg, #fbbf24, var(--gold-accent));
      color: #78350f;
      font-weight: 800;
      box-shadow: 0 4px 12px rgba(245, 158, 11, 0.25);
    }

    .btn-gold:hover {
      background: linear-gradient(135deg, var(--gold-accent), #d97706);
      color: #ffffff;
      transform: translateY(-2px);
    }

    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 6px;
      color: var(--text-main);
    }

    /* 纯色几何风格首屏 (无图片) */
    .hero-section {
      padding: 85px 0 75px;
      background: linear-gradient(180deg, #fff5f5 0%, #ffffff 100%);
      border-bottom: 1px solid var(--border-color);
      position: relative;
    }

    .hero-wrapper {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 40px;
      align-items: center;
    }

    .hero-badge-tag {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: var(--primary-light);
      color: var(--primary-red);
      padding: 6px 16px;
      border-radius: 30px;
      font-size: 0.88rem;
      font-weight: 700;
      margin-bottom: 20px;
      border: 1px solid #fecdd3;
    }

    .hero-title {
      font-size: 2.7rem;
      font-weight: 900;
      color: #111827;
      line-height: 1.25;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .hero-title .highlight {
      color: var(--primary-red);
      position: relative;
      display: inline-block;
    }

    .hero-desc {
      font-size: 1.08rem;
      color: var(--text-regular);
      margin-bottom: 32px;
      line-height: 1.7;
    }

    .hero-cta-group {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      margin-bottom: 36px;
    }

    .hero-data-card {
      background: #ffffff;
      border: 2px solid #fee2e2;
      border-radius: 16px;
      padding: 30px;
      box-shadow: var(--shadow-md);
      position: relative;
    }

    .hero-stat-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 18px;
    }

    .stat-box {
      background: #fff9f9;
      border-radius: 12px;
      padding: 16px;
      border-left: 4px solid var(--primary-red);
    }

    .stat-num {
      font-size: 1.9rem;
      font-weight: 900;
      color: var(--primary-red);
      line-height: 1;
      margin-bottom: 6px;
    }

    .stat-label {
      font-size: 0.88rem;
      color: var(--text-muted);
      font-weight: 600;
    }

    .hero-terminal-box {
      margin-top: 20px;
      background: #2b1416;
      border-radius: 10px;
      padding: 14px 18px;
      color: #fecdd3;
      font-family: monospace;
      font-size: 0.85rem;
      line-height: 1.6;
    }

    .hero-terminal-box span {
      color: #34d399;
    }

    /* 平台介绍 & 核心模型池 */
    .model-tags-wrapper {
      background: #ffffff;
      border-radius: 16px;
      padding: 24px;
      border: 1px solid var(--border-color);
      margin-top: 30px;
      box-shadow: var(--shadow-sm);
    }

    .model-tags-title {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 14px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .tag-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
    }

    .tag-item {
      background: var(--bg-alt);
      color: var(--text-regular);
      font-size: 0.82rem;
      font-weight: 600;
      padding: 5px 12px;
      border-radius: 6px;
      border: 1px solid #fed7aa40;
      transition: var(--transition);
    }

    .tag-item:hover {
      background: var(--primary-red);
      color: #ffffff;
      border-color: var(--primary-red);
    }

    /* 一站式制作场景卡片网格 */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .feature-card {
      background: var(--bg-card);
      border-radius: 14px;
      padding: 24px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      height: 100%;
    }

    .feature-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-lg);
      border-color: #fca5a5;
    }

    .card-icon-box {
      width: 48px;
      height: 48px;
      border-radius: 10px;
      background: var(--primary-light);
      color: var(--primary-red);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      margin-bottom: 18px;
      font-weight: 900;
    }

    .feature-card h3 {
      font-size: 1.15rem;
      font-weight: 800;
      color: #111827;
      margin-bottom: 10px;
    }

    .feature-card p {
      font-size: 0.92rem;
      color: var(--text-regular);
      line-height: 1.6;
      flex-grow: 1;
    }

    .card-highlight-badge {
      display: inline-block;
      font-size: 0.75rem;
      font-weight: 700;
      background: #fef2f2;
      color: var(--primary-red);
      padding: 3px 8px;
      border-radius: 4px;
      margin-top: 14px;
      width: fit-content;
    }

    /* 标准制作流程 */
    .process-timeline {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }

    .process-step {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 24px 20px;
      text-align: center;
      position: relative;
      box-shadow: var(--shadow-sm);
    }

    .step-number {
      width: 42px;
      height: 42px;
      background: linear-gradient(135deg, var(--primary-accent), var(--primary-red));
      color: #ffffff;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      margin: 0 auto 16px;
      font-size: 1.1rem;
      box-shadow: 0 4px 10px rgba(217, 35, 46, 0.25);
    }

    .process-step h4 {
      font-size: 1.05rem;
      font-weight: 800;
      margin-bottom: 8px;
      color: #1f2937;
    }

    .process-step p {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* 对比评测专属板块 */
    .review-score-banner {
      background: linear-gradient(135deg, #b91c1c, #991b1b);
      border-radius: 16px;
      padding: 28px 36px;
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 30px;
      box-shadow: var(--shadow-md);
    }

    .score-badge-area {
      display: flex;
      align-items: center;
      gap: 20px;
    }

    .star-display {
      color: #fcd34d;
      font-size: 1.5rem;
      letter-spacing: 2px;
    }

    .score-number {
      font-size: 3rem;
      font-weight: 900;
      line-height: 1;
      color: #ffffff;
    }

    .score-desc {
      font-size: 0.95rem;
      color: #fecdd3;
    }

    .compare-table-wrapper {
      background: #ffffff;
      border-radius: 16px;
      overflow-x: auto;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 650px;
    }

    .compare-table th, .compare-table td {
      padding: 16px 20px;
      border-bottom: 1px solid #fee2e2;
    }

    .compare-table th {
      background-color: #fff1f2;
      color: #881337;
      font-weight: 800;
      font-size: 0.95rem;
    }

    .compare-table td {
      font-size: 0.92rem;
      color: var(--text-regular);
    }

    .compare-table tr:hover td {
      background-color: #fffafb;
    }

    .compare-highlight {
      font-weight: 700;
      color: var(--primary-red);
    }

    /* 媒体与案例展示区 (规范引入媒体库图片) */
    .media-card-grid {
      display: grid;
      grid-template-columns: 1.4fr 1fr;
      gap: 24px;
      align-items: stretch;
    }

    .media-box {
      background: #ffffff;
      border-radius: 14px;
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
    }

    .media-box .img-holder {
      aspect-ratio: 16 / 9;
      background: #fee2e2;
      overflow: hidden;
    }

    .media-box .img-holder-sq {
      aspect-ratio: 1 / 1;
      background: #fee2e2;
      overflow: hidden;
    }

    .media-box img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }

    .media-box:hover img {
      transform: scale(1.03);
    }

    .media-content {
      padding: 20px;
    }

    .media-content h4 {
      font-size: 1.1rem;
      font-weight: 800;
      margin-bottom: 8px;
    }

    .media-content p {
      font-size: 0.88rem;
      color: var(--text-muted);
    }

    /* 客户真实评价 */
    .review-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .review-card {
      background: #ffffff;
      border-radius: 14px;
      padding: 24px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .review-stars {
      color: #f59e0b;
      font-size: 0.95rem;
      margin-bottom: 12px;
    }

    .review-text {
      font-size: 0.92rem;
      color: var(--text-regular);
      line-height: 1.65;
      margin-bottom: 18px;
    }

    .reviewer-info {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px dashed var(--border-color);
      padding-top: 14px;
    }

    .reviewer-avatar {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: var(--primary-light);
      color: var(--primary-red);
      font-weight: 800;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 0.95rem;
    }

    .reviewer-name {
      font-size: 0.95rem;
      font-weight: 800;
      color: #111827;
    }

    .reviewer-role {
      font-size: 0.8rem;
      color: var(--text-muted);
    }

    /* FAQ 互动面板 */
    .faq-container {
      max-width: 900px;
      margin: 0 auto;
    }

    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 10px;
      margin-bottom: 12px;
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }

    .faq-question {
      padding: 18px 22px;
      font-size: 1rem;
      font-weight: 700;
      color: #111827;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      user-select: none;
      transition: background-color 0.2s ease;
    }

    .faq-question:hover {
      background-color: var(--primary-light);
    }

    .faq-toggle-icon {
      font-size: 1.2rem;
      color: var(--primary-red);
      transition: transform 0.3s ease;
    }

    .faq-answer {
      padding: 0 22px 18px;
      font-size: 0.92rem;
      color: var(--text-regular);
      line-height: 1.65;
      display: none;
    }

    .faq-item.active .faq-answer {
      display: block;
    }

    .faq-item.active .faq-toggle-icon {
      transform: rotate(45deg);
    }

    /* 需求表单与代理加盟区 */
    .form-wrapper {
      background: #ffffff;
      border: 2px solid #fee2e2;
      border-radius: 16px;
      padding: 36px;
      box-shadow: var(--shadow-md);
    }

    .form-layout {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
    }

    .form-group {
      display: flex;
      flex-direction: column;
      gap: 6px;
    }

    .form-group.full-width {
      grid-column: span 2;
    }

    .form-label {
      font-size: 0.9rem;
      font-weight: 700;
      color: var(--text-main);
    }

    .form-input, .form-select, .form-textarea {
      width: 100%;
      padding: 12px 14px;
      border: 1px solid #d1d5db;
      border-radius: 8px;
      font-size: 0.92rem;
      color: var(--text-main);
      background-color: #fafafa;
      outline: none;
      transition: var(--transition);
      font-family: inherit;
    }

    .form-input:focus, .form-select:focus, .form-textarea:focus {
      border-color: var(--primary-red);
      background-color: #ffffff;
      box-shadow: 0 0 0 3px rgba(217, 35, 46, 0.12);
    }

    .form-textarea {
      min-height: 110px;
      resize: vertical;
    }

    /* 资讯文章与生态外链板块 */
    .article-link-list {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
      gap: 12px;
      margin-top: 20px;
    }

    .article-item-link {
      background: #ffffff;
      padding: 12px 16px;
      border-radius: 8px;
      border: 1px solid var(--border-color);
      font-size: 0.88rem;
      font-weight: 600;
      color: var(--text-main);
      display: flex;
      align-items: center;
      gap: 8px;
      transition: var(--transition);
    }

    .article-item-link:hover {
      border-color: var(--primary-red);
      color: var(--primary-red);
      background: var(--primary-light);
    }

    /* 底部专属板块 */
    .site-footer {
      background-color: #1a0809;
      color: #f3f4f6;
      padding-top: 60px;
      padding-bottom: 30px;
      border-top: 3px solid var(--primary-red);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 1fr 1fr 1fr;
      gap: 36px;
      margin-bottom: 40px;
    }

    .footer-col h5 {
      color: #ffffff;
      font-size: 1.05rem;
      font-weight: 800;
      margin-bottom: 18px;
      position: relative;
      padding-bottom: 8px;
    }

    .footer-col h5::after {
      content: '';
      position: absolute;
      left: 0;
      bottom: 0;
      width: 28px;
      height: 2px;
      background-color: var(--primary-red);
    }

    .footer-text {
      font-size: 0.88rem;
      color: #d1d5db;
      line-height: 1.7;
      margin-bottom: 16px;
    }

    .footer-list li {
      margin-bottom: 10px;
      font-size: 0.88rem;
      color: #9ca3af;
    }

    .footer-list a {
      color: #d1d5db;
    }

    .footer-list a:hover {
      color: #fca5a5;
    }

    .footer-qr-box {
      background: #ffffff;
      padding: 8px;
      border-radius: 8px;
      display: inline-block;
      margin-top: 6px;
    }

    .footer-qr-box img {
      width: 100px;
      height: 100px;
      object-fit: contain;
    }

    .friend-links-area {
      border-top: 1px solid #372022;
      padding-top: 24px;
      margin-bottom: 24px;
    }

    .friend-links-title {
      font-size: 0.9rem;
      font-weight: 700;
      color: #e5e7eb;
      margin-bottom: 12px;
    }

    .friend-links-list {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
    }

    .friend-links-list a {
      font-size: 0.85rem;
      color: #9ca3af;
    }

    .friend-links-list a:hover {
      color: #fca5a5;
    }

    .footer-bottom {
      border-top: 1px solid #372022;
      padding-top: 24px;
      text-align: center;
      font-size: 0.82rem;
      color: #9ca3af;
    }

    /* 浮动客服挂件 */
    .float-service-widget {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 48px;
      height: 48px;
      background: var(--primary-red);
      color: #ffffff;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 6px 16px rgba(217, 35, 46, 0.4);
      cursor: pointer;
      font-size: 1.1rem;
      font-weight: 800;
      border: 2px solid #ffffff;
      transition: var(--transition);
    }

    .float-btn:hover {
      transform: scale(1.08);
      background: var(--primary-dark);
    }

    /* 移动端响应式断点控制 */
    @media (max-width: 992px) {
      .hero-wrapper {
        grid-template-columns: 1fr;
      }
      .grid-3 {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-4 {
        grid-template-columns: repeat(2, 1fr);
      }
      .process-timeline {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
      .media-card-grid {
        grid-template-columns: 1fr;
      }
      .review-grid {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 768px) {
      .nav-links, .nav-actions {
        display: none;
      }
      .nav-links.active {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #ffffff;
        border-bottom: 1px solid var(--border-color);
        padding: 16px 20px;
        box-shadow: var(--shadow-md);
      }
      .mobile-menu-btn {
        display: block;
      }
      .hero-title {
        font-size: 2.1rem;
      }
      .grid-3, .grid-4, .process-timeline {
        grid-template-columns: 1fr;
      }
      .form-layout {
        grid-template-columns: 1fr;
      }
      .form-group.full-width {
        grid-column: span 1;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .review-score-banner {
        flex-direction: column;
        text-align: center;
        gap: 16px;
      }
    }